Debt (Narrative) (Details) - USD ($)		6 Months Ended
	Apr. 03, 2016	Jul. 31, 2017	Jun. 30, 2017	Mar. 13, 2017	Oct. 26, 2016	Oct. 25, 2016
Line of Credit Facility [Line Items]
Line of Credit Facility, Interest Rate at Period End		4.80%
Company restriction from issuing dividends or making payments with respect to the Company's Capital Stock to it's annual limit		$ 1,300,000
Provision to reduce borrowings under the line		$ 6,000,000
Provision to reduce borrowings under the line, period	60 days	30 days
PNC [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Remaining borrowing capacity		$ 31,938,000
Revolving advances		$ 11,000,000	$ 14,000,000
PNC [Member] | Revolving Credit Facility [Member] | Amendment No. 7 To The Credit Agreement [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity					$ 49,500,000	$ 49,750,000
Line of Credit Facility, Capacity Available for Equipment Financing				$ 2,500,000
Eurodollar [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Revolving credit facility bears interest range of		1.50%
Eurodollar [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Revolving credit facility bears interest range of		2.50%
Alternate Base Rate Loans [Member] | London Interbank Offered Rate LIBOR [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Revolving credit facility bears interest range of		0.50%
Alternate Base Rate Loans [Member] | London Interbank Offered Rate LIBOR [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Revolving credit facility bears interest range of		1.50%